What is the Foreign Exchange? What is Forex?

Investing is a passive thing that anyone can do and hope the markets go up and the economy improves and the system doesn’t fall apart again or another bubble doesn’t burst or the Fed doesn’t do something stupid, etc.

Trading is a profession, not a hobby. It requires committment, many more resources, much more education and training and experience and resources, like any profession. But unlike any other profession, the risk is very high, especially in Forex with 100:1 leverage. You may not know what that term means, but it is a primary killer in the futures and Forex markets, even for those that think they know something. Training is very expensive.

I’m not sure what you mean by stock trading being the "same" as Forex trading. They require different brokers and accounts. A stock is essentially part of a company with their own set of circumstances, products and services, marketing and competitive issues, employees and CEO’s. Trading the Forex is a world currency against another, called a currency pair, like GBP/USD, with their own set of world circumstances, governments, bailouts, GDP reports, interest rates, unemployment rates, etc.

What Does Forex Market Mean?
The market in which participants are able to buy, sell, exchange and speculate on currencies. The forex markets is made up of banks, commercial companies, central banks, investment management firms, hedge funds, and retail forex brokers and investors. The currency market is considered to be the largest financial market in the world, processing trillions of dollars worth of transactions each day.

Investopedia explains Forex Market
The foreign exchange markets isn’t dominated by a single market exchange, but involves a global network of computers and brokers from around the world. Central banks use their massive buying and selling capabilities to alter exchange rates through their open market activities and in many cases will do so not with profit in mind, but rather for any number of policy reasons. Forex brokers act as market makers as well, and may post bid and ask prices for a currency pair that differs from the most competitive bid in the market.

Source(s):
http://www.investopedia.com/terms/forex/…
References :

Forex market

The Forex market is a non-stop cash market where currencies of nations are traded, typically via brokers. Foreign currencies are constantly and simultaneously bought and sold across local and global markets and traders’ investments increase or decrease in value based upon currency movements. Foreign exchange market conditions can change at any time in response to real-time events.

The main enticements of currency dealing to private investors and attractions for short-term Forex trading are:

24-hour trading, 5 days a week with non-stop access to global Forex dealers.
An enormous liquid market making it easy to trade most currencies.
Volatile markets offering profit opportunities.
Standard instruments for controlling risk exposure.
The ability to profit in rising or falling markets.
Leveraged trading with low margin requirements.
Many options for zero commission trading.

Forex trading
The investor’s goal in Forex trading is to profit from foreign currency movements. Forex trading or currency trading is always done in currency pairs. For example, the exchange rate of EUR/USD on Aug 26th, 2003 was 1.0857. This number is also referred to as a "Forex rate" or just "rate" for short. If the investor had bought 1000 euros on that date, he would have paid 1085.70 U.S. dollars. One year later, the Forex rate was 1.2083, which means that the value of the euro (the numerator of the EUR/USD ratio) increased in relation to the U.S. dollar. The investor could now sell the 1000 euros in order to receive 1208.30 dollars. Therefore, the investor would have USD 122.60 more than what he had started one year earlier. However, to know if the investor made a good investment, one needs to compare this investment option to alternative investments. At the very minimum, the return on investment (ROI) should be compared to the return on a "risk-free" investment. One example of a risk-free investment is long-term U.S. government bonds since there is practically no chance for a default, i.e. the U.S. government going bankrupt or being unable or unwilling to pay its debt obligation.
When trading currencies, trade only when you expect the currency you are buying to increase in value relative to the currency you are selling. If the currency you are buying does increase in value, you must sell back the other currency in order to lock in a profit. An open trade (also called an open position) is a trade in which a trader has bought or sold a particular currency pair and has not yet sold or bought back the equivalent amount to close the position.

However, it is estimated that anywhere from 70%-90% of the FX market is speculative. In other words, the person or institution that bought or sold the currency has no plan to actually take delivery of the currency in the end; rather, they were solely speculating on the movement of that particular currency.
References :
http://www.makfx.com/en